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43%
Check your VoIP networks with SIPVicious and sngrep
30.11.2025
Home »  Archive  »  2025  »  Issue 90 VoIP N...  » 
Photo by Quino Al on Unsplash
Request-Line: INVITE sip:1234@192.168.1.104 SIP/2.0 Shows that the number 1234 is being called on the server with the IP address 192.168.1.104. From: The caller
43%
Cgroups for resource management in Linux
30.11.2025
Home »  Archive  »  2011  »  Issue 6: Perfor...  » 
© Photographer, 123RF.com
in the cgroup. You can then use the tc with the group. Start by defining the classID for the cgroup: echo 0x00100001 > /cgroup/net_cls/libvirt/qemu/guest/net_cls.classid This hexadecimal number comprises two
43%
Neglected IPv6 features endanger the LAN
30.11.2025
Home »  Archive  »  2012  »  Issue 10: Traff...  » 
© Stanislaw Tokarski, 123RF.com
support to its Windows Vista and Windows Server platforms in 2007. Linux in all its variants and Apple's Mac OS X followed suit; thus, the new protocol spread with each new installation. On all ... IPv6 is establishing itself in everyday IT life, and all modern operating systems from Windows, through Mac OS X, to Linux have it on board; but if you let IPv6 introduce itself into your environment
43%
Manage your servers with System Center Essentials
30.11.2025
Home »  Archive  »  2011  »  Issue 3: Are yo...  » 
Kheng Ho Toh, 123RF.com
-fledged devices. So, if you purchase 20 licenses and need to monitor 20 physical and 30 virtual servers on the network, you can't add any more license packages, because you have reached the upper limit
43%
Dispatches from the world of IT
30.11.2025
Home »  Archive  »  2011  »  Issue 3: Are yo...  » 
 
started pushing its 64-bit Itanium line, some journalist wags dubbed it the "Itanic" because it failed to get the kind of market support Intel had hoped for – whereas AMD's 64-bit line of x86 chips caught
43%
Monitoring daemons with shell tools
30.11.2025
Home »  Archive  »  2010  »  Issue 1: System...  » 
© Shariff Che'Lah, 123RF.com
is not accessible! ****************" >> dba.log 15 /usr/local/etc/rc.d/002pgsql.sh start 16 sleep 15 17 psql -U monitor -d monitor -c "select * from watch;" 18 19 if [ $? -eq 0 ]; 20 21 then 22
43%
Virtualization with KVM
30.11.2025
Home »  Archive  »  2010  »  Issue 2: Backup...  » 
systems on your virtual machines, the Linux host system must provide a 64-bit kernel. To determine this, run the uname -m command, and it should output a value of x86_64 or amd64. You can run virtual
43%
Virtualize Browsers, Apps, and Desktops
02.06.2026
Home »  Archive  »  2026  »  Issue 93 Disast...  » 
Lead Image © denis cristo, 123RF.com
, developing and testing web applications with different browsers, or even collaborating on websites. Almost 20 years ago, the German Federal Office for Information Security (BSI) coined the term "remote
43%
Get the best out of your bandwidth with tc
30.11.2025
Home »  Archive  »  2012  »  Issue 10: Traff...  » 
© Russell Shively, 123RF.com
help point out which line is the culprit. Simply run your script as follows: # bash -x ./bandwidth_throttler Typing dmesg could give direct feedback from the kernel too. Cooking with Gas Now I
43%
The next generation of Internet connectivity
30.11.2025
Home »  Archive  »  2011  »  Issue 3: Are yo...  » 
ktsdesign, 123RF.com
:%02x%02x\n' 19 83 20 235 Note that 6to4 relays (the machines that handle your traffic) use the anycast address of 192.88.99.1 (2002:c058:6301::), so finding out who is actually handling your traffic

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